Brake-applying means



May 6, 1936. G; HUNT 1,756,979

' BRAKE APPLYING MEANS Filed July 16 1927 INVENTOR 650536.15 H. HUNT Qu t-M TTORNEY Patented Y ononen n. v

- v oriemoaoo;

I we?are This invention relates to'brakes illustrated as embodiedin novel operating-1 means for an automobile brake; An ob ect T of the invention is to provide sim' lo and reliable means for adjusting the br e to com-' pensate for Wear and which preferably can e operated automatically. f

In one desirable arrangement there are two shaft sections arranged end to end and provided withinterlocking teeth, together with means for automatically shifting one section angularly with respect to the other to adjust for wear of the brake. Preferably one of the shaft sections is hollow and the a plyin device operated thereby has a art Another feature of the invention relates to positioning an applying device such as a cam,

by means of a radially extending arm engaging a stop which limits its movement. Preferably the stop engaged by the arm is shiftable, for example against frictional resistance, to set it for a predetermined release movement of'the ap lying device so that its osition is adjusted automatically as the rake wearsfl The above and other, objects andfeatures of the invention, including various'novel and desirable details of construction, will be parent from the followin description oi one illustrative embodiment own in the accompanying drawing, in which: I v vFigure 1 is a partial section through the upper part of the brake and showing most 0 the adjusting and applying means in rear Figure 2 is asection on -the line 22 of Figure l and showing the applyi means in outside elevation; 1' v I The brake illustrated includes a rotatable drumlm'at theopen side of which isa backing'plate'ilitand within which. isa'rrangedth e frictionmeans of the brake. Friction means of any desired character may be used,-'ore -fl ample brake "shoes shown "and" described m Patent No; 1,56'21' ,7 1t, granted Bendix Brake r Company on December 29,- 1925, on applicato apip as a ouble cam'14.

a separate part secured there f pro ects into the-interior ofathe hollow shaft *ing through an arcuate slot in a stamping "52 held. by the bolts 22 A'clamp ,nnt threaded on the end of the stem 48, friction r ally clamps the stop 46 to the stamping '52.

H em ow BEND. "Amp ,1

sem n, Q f amers a ear. :-n5 1 ?rhe a s i551?- qmvalents are forced age sat i y the-brake byanp' y s a Theep ying deviceiili a =5 short sha t section l'dhaving teethiuterlockinswith teeth'on hf'nd of aghollow" shaft v or sleeve 18 journalled in a brack by bolts 22 or the like tenths; The applying deviceal so h par. may be integral withshepart' be and-w ,ch

18. An extension 26"ofthisportionfitis engaged by a washer 28; which washer also. engages the end of the hollow. shaft 158*whe1i, the teeth on shaftsections 'lfiaandlS are-in interlocking engagement" with each-"ether; The portion 24 is further extended by a 'post' 30, which may be a separate part,- threaded into the end of part 28 to compress-aeoil spring 34. It. will be seen thatthe-spring holdsthe teeth on the shaft sections '16 and 18, yieldin ly in interlocking-engagement, Means Forrockingthe hollowshaft 18 to apply :the brake may include an M11136 clamped on the end ofjthe hollow shaft and engaged by an "integralbaIl 38- on theend of a generally horizontal vhirer 40,- When Y j arm 42 in an amount equal. to the desired an ularmovement of the arm 42 when the br 7 e is released. The stop 46 has a stem a8 extends.

In the operation of the device described above, theapplication of thabrake after it is $9 to I . tional resistance of the'nut 54'. Then, when the brake is released, the, arm 4-2'again engages the initial side of the opening in the stop 46 after the predetermined angularrelease move- 'ment, and holdsthe cam 14 or its equiyalent' in a correspondmg'positmn such as to give the brakehoes a predetermined clearance :with res ectto the brakedrum.

or e'rto insure the returnof the hollow I shaft section 18 and its arm 36 to their initial positions, any adjusted position of-the applying-dev ce; 14', Ifpreier toprovide a strong torsion sp'rin 56 connected at one end to the portion24- o ztheapplying device and at'its Ell otherjend the hollow shaft 18 When the 2 applyingdeviofe 1a is stoppedin a new positionto compensate for wearfofthe brake, the

56=wil1ishiit the hollowjshaft 18 to elite {its initial position, whereprin'g 3lwill again force the teeth on the hollow shaft 18 into interlocking en gagerne'nt with the teeth onthe shalt sections limit the S00 e of the invcntionto that particular embo iment or otherwise than by the terms of the appended claims.

I claim:

1. Brake-applying means comprising, in

combination, a hollow shaft arran to be operated to apply the brake, an'app ymg de;

vice operated by the hollow shaft and'havin a part extending into the hollow shaft, an

means acting on said part for automatically causing relative turning movement of said deviceangularly with respect to the hollow shaft to compensate for wear of the brake.

2. Brake-applying means comprising, combination, a hollow shaft arranged to be o erated to apply the brake, an app ying devi ce'operated by the hollow shaft and having a part extending into the hollow shaft, 9. stop I and a springcooperating with the stop an acting on said part for automatically causing gu'larly with respect to the hollow shaft to compensate for wear of the brake,

3. Brake-applying means comprising, in

combination, a hollow shaft arranged to be operated to apply the brake',,an appl 'ngde torsion spring housed within the hollow shaft beyond said part and connected at one end to the shaft and at the other enolto saidparty and urging the applyingdevice and the shaft angularly in opposite directions to oompen-' sate for wear of the brake.

operated to apply the brake, an app ying desate for ,wear 0 puma 1 a 7 tolthejshaft and at the other end to said part I 'and'urging'the' applying device and the shaft cause the spring'to, turn the applyingdevice with respect'to'the shaft.

operating shaft for the applying device the applying deviceand the shaft having interlocking- .=ratchet teeth and means'extending through thejliollo'w shaft'for urging said teeth .7

5. Brake applying means compr1si ng,in I combination,- an applying device, a' hollow vice operated bythe hollow shaft and having. I v a part extending into the hollow shaft, a tor- I rsion-sprin *housedwithin the hollow shaft beyond sald part and connected at one end together,-togetlier with means for automaticallyfcansing' relative turning movement of the applying'device withrespectto the shaft and then permitting theteethto interlock again to compensate forwear of theIbrakeQ- Q I 6. rake applying meanscornprising, 'in

combination, an applying-device, a hollow operating shaft for the applying device,- the V. I v I v applying device and the-shaft having inter- While one illustrative embodiment has been described in detail, it is not my intention to lockmg ratchet teeth apart connected to the applying device and extending through the I hollow shaft and having at its end a stop bethe applyingfdevice'uwith respect to the shaft and thenpermittingthe teeth "to interlock again,lto; c ompensatc forlwear of the brake.

I 7.: B1 'ake-applying means comprising, in I combination, an applying device, a hollow operatingishaft for the applying-device,- the ap' lying device and the shafthaving intern' ratchet teeth, and means extending throng the hollow shaft for urging said teeth.

together, together with a torsion spring housed within the hollow shaft for-causing relative turning movement of the applying device with respect to the shaft and then permitting the; teeth tointerlock again, to .compensate for wear ofthe brakes. relative turning movement of said oevicean- I 8. Brakeapplying vmeans comprising, in combination, an applying. device, a hollow operating shaft fonthe applying device, the

applying deviceandthe shafthaVi nginterIocking ratchet teeth, apart connected to'the-a I I I lying devieeand extending through the he --1 vice operated by the hollow shaft having. a part extending into the hollow shaft-, and a I respect to shaftfand then permitting the tethto interlockagain,to compensate for;

wear-fclothe:bralsej -'-,..p V I 9. Bral e apply1ng means comprising, in combmat ome" racket formed with rearing 'cally cansingfrelatlve turning movement of I having a slot in one side, an applying device having a part in said bearin and an arm extending radially through sai slot, and a stop engageable with the arm to limit the movu'nent of the applying device.

10. Brake-applyin means comprising, in combination, an app 'ng device having an arm extending radia ly, and a frictionally held stop engageable with the arm to limit the movement of the applying device, said stop v being shiftable on the application of the brake and permitting only a predetermined release movement of the applying device.

11. Brake-applyin means comprising, in combination, an app ing device having an arm extending radial a stop having an opening embracing sai arm and permitting it to have a predetermined free angular movement, and a mounting for the stop permitting the arm to shift the stop in case of excessive wear of the brake.

12. Brake-applying means comprising, in combination, an applying device having an arm extending radially, a stop having an opening embracing said arm and permitting it to have a predetermined free angular movement, and means frictionally resisting shifting of the stop.

In testimony whereof, I have hereunto signed my name.

' GEORGE H. HUNT, 

